Most elements are exclusively configurated via the Edit Sidebar. Some elements however can be opened to enable access to further levels where additional elements may be created.
This pertains mostly to elements in the Project Editor:
EPC Model
Organization Model
Integration
Administration Model
App Project
Folder
Inside of an EPC Model some more elements are available:
Responsive Form
Mobile Form
Mobile Overview
An element can be opened via double click or via the context menu.
Right click on the element to open the context menu. Now select the option Open.
You may leave the element via the Back button in the navigation bar. This takes you back to the higher level.